Shi Yuxiang, Wang Fan, Tian Jingwen, Li Shuyao, Fu Engang, Nie Jinhui, Lei Rui, Ding Yafei, Chen Xiangyu, Wang Zhong Lin
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
Sci Adv. 2021 Feb 3;7(6). doi: 10.1126/sciadv.abe2943. Print 2021 Feb.
Tactile sensation plays important roles in virtual reality and augmented reality systems. Here, a self-powered, painless, and highly sensitive electro-tactile (ET) system for achieving virtual tactile experiences is proposed on the basis of triboelectric nanogenerator (TENG) and ET interface formed of ball-shaped electrode array. Electrostatic discharge triggered by TENG can induce notable ET stimulation, while controlled distance between the ET electrodes and human skin can regulate the induced discharge current. The ion bombardment technique has been used to enhance the electrification capability of triboelectric polymer. Accordingly, TENG with a contact area of 4 cm is capable of triggering discharge, leading to a compact system. In this skin-integrated ET interface, touching position and motion trace on the TENG surface can be precisely reproduced on skin. This TENG-based ET system can work for many fields, including virtual tactile displays, Braille instruction, intelligent protective suits, or even nerve stimulation.
触觉在虚拟现实和增强现实系统中发挥着重要作用。在此，基于摩擦纳米发电机（TENG）和由球形电极阵列构成的电触觉（ET）接口，提出了一种用于实现虚拟触觉体验的自供电、无痛且高度灵敏的电触觉系统。TENG触发的静电放电可诱发显著的电触觉刺激，而ET电极与人体皮肤之间的可控距离能够调节感应放电电流。离子轰击技术已被用于增强摩擦电聚合物的起电能力。因此，接触面积为4平方厘米的TENG能够触发放电，从而实现系统的紧凑化。在这种与皮肤集成的ET接口中，TENG表面的触摸位置和运动轨迹能够在皮肤上精确重现。这种基于TENG的ET系统可应用于许多领域，包括虚拟触觉显示器、盲文教学、智能防护服，甚至神经刺激。
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